91482563641
domain: N
Appears in sequences
- Dirichlet convolution of b_n=1 with Catalan numbers.at n=22A034731
- a(n) = C(n) + 1 - 0^n where C(n) = A000108(n).at n=22A141351
- G.f.: 1 + Sum_{n>=1} x^n * exp( Sum_{k>=1} binomial(2*n*k-1, n*k) * x^(n*k)/k ).at n=23A206777
- Number of Dyck n-paths with equally spaced returns.at n=23A216435
- Number of excursions of length n with Motzkin-steps avoiding the consecutive steps UH, HU, HD and DH.at n=44A329696